<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>系统登录</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', sans-serif;
        }

        body {
            background-color: #f5f7fa;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }

        .login-container {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            width: 350px;
            padding: 30px;
        }

        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .login-header h1 {
            color: #3498db;
            font-size: 28px;
            margin-bottom: 10px;
        }

        .login-header p {
            color: #7f8c8d;
            font-size: 14px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #2c3e50;
            font-weight: 600;
        }

        .form-group input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus {
            border-color: #3498db;
            outline: none;
        }

        .login-btn {
            width: 100%;
            padding: 12px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

        .login-btn:hover {
            background-color: #2980b9;
        }
    </style>
</head>
<body>
    <div class="login-container">
        <div class="login-header">
            <h1>平台登录</h1>
            <p>没有密码，直接输入名称即可</p>
        </div>
        <form method="post">
            <div class="form-group">
                <label for="username">用户名</label>
                <input type="text" id="username" name="username" placeholder="请输入用户名" required>
            </div>
            <button type="submit" class="login-btn">登 录</button>
        </form>
    </div>
</body>
</html>